Wheel help required

[10PISTNZ]

Looking to upgrade the wheels on my RT10 and I have a few questions.
First off, I like the polished Gen 5 Venom wheels.
1) I searched all 20 pages of photos in the gallery and couldn't find one with these wheels on a gen 2. Does anyone have a photo they could post? If the Gen 2 is Yellow - perfect.
2) I did find a photo of a Yellow GTS with Black Sidewinders so the offset is perfect. I suspect the offset is the same on all Gen 5 GTS wheels. Can anyone confirm?
3) I would like to keep the front tire size the same as stock 275/35x18 that were used in Gens 2/3/4 but the wheels are a half inch wider. I want to keep the 345/30x19 rear tire size used on the Gen 3/4. Any issues?
4) Will the Gen 2 center caps fit?

This is the photo I found. Can someone tell what tire sizes these are?17563

[MacGyvers Mullet]

Knew I remembered a B/W with the sidewinders...Here is the page to it for some pics...

http://www.autorestorationice.com/2015/02/awesome-1997-dodge-viper-gts.html

I know they aren't the venom's, but maybe it can give you some other perspective.

[Fatboy 18]

https://c4.staticflickr.com/8/7097/26213407083_8b819b914b_b.jpg
One of our UK members cars, Think he got the wheels from JonB Partsrack, Jon will put you straight with tire sizes required :)

[Vprbite]

Some people run spacers in the rear. Some don't. I think it's a matter of preference because it's minimal how much more inboard they are. I have seen both in person and could go either way. If I did it (I have a gen III now) I probably would run small spacers. But would be fine without.

[10PISTNZ]

The offset is perfect in both those photos. I will check and more than likely purchase from JonB as I have many times in the past with different items. I will be getting the lowering caps too. Giving it slightly more -camber helps handling and looks as well.
I was hoping to find a photo of a set of Venom wheels on a Gen 2, NOT Black. I know, everyone seems to like the Black wheel look. Not me though. (over 60)

[10PISTNZ]

Found a set of the wheels I wanted locally. Now I have to install the lowering caps18061 18065